Serialization/Deserialization with Codemations.Asn1

Example class ¹:

[AsnSequence]
public class FooQuestion
{
    [AsnTag]
    public BigInteger TrackingNumber { get; set; }
    [AsnTag]
    public string Question { get; set; }
}

Serialization:

var myQuestion = new FooQuestion
{
    TrackingNumber = 5,
    Question = "Anybody there?"
};
AsnSerializer.Serialize(myQuestion, AsnEncodingRules.DER);

Output (hex):

30, 13,
    02, 01, 05,
    16, 0e, 41, 6e, 79, 62, 6f, 64, 79, 20, 74, 68, 65, 72, 65, 3f

Deserialization:

var encodedData = new byte[] {
    0x30, 0x13, 0x02, 0x01, 0x05, 0x16, 0x0e, 0x41, 0x6e, 0x79, 0x62, 0x6f, 0x64, 0x79, 0x20, 0x74, 0x68, 0x65, 0x72, 0x65, 0x3f
};

AsnSerializer.Deserialize<FooQuestion>(encodedData, AsnEncodingRules.DER);

Built-in types mapping

.NET Type	ASN.1 Type	Description
bool	BOOLEAN	Represents a true or false value.
byte	INTEGER	Unsigned integer (8-bit).
sbyte	INTEGER	Signed integer (8-bit).
short	INTEGER	Signed integer (16-bit).
ushort	INTEGER	Unsigned integer (16-bit).
int	INTEGER	Signed integer (32-bit).
uint	INTEGER	Unsigned integer (32-bit).
long	INTEGER	Signed integer (64-bit).
ulong	INTEGER	Unsigned integer (64-bit).
BigInteger	INTEGER	Arbitrary-precision integer.
string	OBJECT IDENTIFIER	UTF-8 encoded string.
byte[]	OCTET STRING	A sequence of bytes.
T[] (except byte[])	SEQUENCE OF	A sequence of elements of type T.
List<T>	SEQUENCE OF	A sequence of elements of type T.
class 2	CHOICE	A choice of elements.
record 2	CHOICE	A choice of elements.
class	SEQUENCE	A sequence of elements.
record	SEQUENCE	A sequence of elements.

Footnotes

1. https://en.wikipedia.org/wiki/ASN.1 ↩

2. with AsnPolymorphicChoice or AsnChoice attribute ↩ ↩²